Styrene → 2-Methylbuta-1,3-diene;styrene

HRID 1779558Notes

Reaction equation

HRID 1779558 reaction equation
[CH2:1]=[CH:2][C:3]1[CH:8]=[CH:7][CH:6]=[CH:5][CH:4]=1.[Li]CCCC>>[CH2:1]=[CH:2][C:3](=[CH2:4])[CH3:8].[CH2:1]=[CH:2][C:3]1[CH:8]=[CH:7][CH:6]=[CH:5][CH:4]=1

Participants

3

Reactant 2

HCID 7501StyreneHCID 178418339Butyllithium

Product 1

HCID 1599892-Methylbuta-1,3-diene;styrene

Procedure

The procedure described in Example 9 was utilized in this example except that a premix containing 25:75 mixture of styrene and 1,3-isoprene in hexanes was used in place of isoprene and the modifier was changed from STA/DPE to ETE alone. The molar ratio of ETE to n-BuLi was 0.5:1. The Tg, microstructure of 25/75 SIR (styrene-isoprene rubber) formed and the time needed to consume more than 90 percent of the monomers charged are listed in TABLE 8.

Workup

  1. additioncontaining

Sources & evidence

ORD record
ord-d9843d6fea184e02874ef8c1daf37ca0
Source dataset
uspto-grants-1997_05
Patent number
US05627237

Reaction notes

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